55805025 has 48 divisors (see below), whose sum is σ = 95618880. Its totient is φ = 28704000.

The previous prime is 55805023. The next prime is 55805039. The reversal of 55805025 is 52050855.

It is not a de Polignac number, because 55805025 - 2¹ = 55805023 is a prime.

It is a super-2 number, since 2×55805025² = 6228401630501250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55804983 and 55805001.

It is not an unprimeable number, because it can be changed into a prime (55805021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 401406 + ... + 401544.

It is an arithmetic number, because the mean of its divisors is an integer number (1992060).

Almost surely, 2^55805025 is an apocalyptic number.

It is an amenable number.

55805025 is a deficient number, since it is larger than the sum of its proper divisors (39813855).

55805025 is a wasteful number, since it uses less digits than its factorization.

55805025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 55805025 is about 7470.2760993152. The cubic root of 55805025 is about 382.1417038675.

The spelling of 55805025 in words is "fifty-five million, eight hundred five thousand, twenty-five".